diff --git a/pkg/webhook/v1beta1/experiment/validator/validator.go b/pkg/webhook/v1beta1/experiment/validator/validator.go
index 9f0f1c3ff5b..27ad4e33568 100644
--- a/pkg/webhook/v1beta1/experiment/validator/validator.go
+++ b/pkg/webhook/v1beta1/experiment/validator/validator.go
@@ -82,10 +82,11 @@ func (g *DefaultValidator) ValidateExperiment(instance, oldInst *experimentsv1be
 	var allErrs field.ErrorList
 
 	namingConvention, _ := regexp.Compile("^[a-z]([-a-z0-9]*[a-z0-9])?")
-	if !namingConvention.MatchString(instance.Name) {
+	if !namingConvention.MatchString(instance.Name) || len(instance.Name) > 40 {
 		msg := "name must consist of lower case alphanumeric characters or '-'," +
 			" start with an alphabetic character, and end with an alphanumeric character" +
-			" (e.g. 'my-name', or 'abc-123', regex used for validation is '^[a-z]([-a-z0-9]*[a-z0-9])?)'"
+			" (e.g. 'my-name', or 'abc-123', regex used for validation is '^[a-z]([-a-z0-9]*[a-z0-9])?)'" +
+			" and may not be larger than 40 characters. "
 
 		allErrs = append(allErrs, field.Invalid(field.NewPath("metadata").Child("name"), instance.Name, msg))
 	}
diff --git a/pkg/webhook/v1beta1/experiment/validator/validator_test.go b/pkg/webhook/v1beta1/experiment/validator/validator_test.go
index c815b799d74..b8d51548a61 100644
--- a/pkg/webhook/v1beta1/experiment/validator/validator_test.go
+++ b/pkg/webhook/v1beta1/experiment/validator/validator_test.go
@@ -86,6 +86,17 @@ func TestValidateExperiment(t *testing.T) {
 			},
 			testDescription: "Name is invalid",
 		},
+		{
+			instance: func() *experimentsv1beta1.Experiment {
+				i := newFakeInstance()
+				i.Name = "test-manymanymanyextracharactersthatgobeyondlimit"
+				return i
+			}(),
+			wantErr: field.ErrorList{
+				field.Invalid(field.NewPath("metadata").Child("name"), "", ""),
+			},
+			testDescription: "Name is invalid",
+		},
 		// Objective
 		{
 			instance: func() *experimentsv1beta1.Experiment {